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Fix a desktop that has no display

We'll rule out cable, input selection, and monitor power, then isolate the cause—cable fault, GPU, or driver—or tell you when to call a pro.

Troubleshooting · Home maintenance
10–25 min
What you'll need
  • Known-good video cable (HDMI, DisplayPort, or VGA)
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Steps

Goal: Rule out cable and input, then isolate GPU or driver failure.

Check cable and input

Goal: Rule out loose connection and wrong input selection.

  • Reseat the video cable at both the monitor and the PC. Check for bent pins on VGA or DVI.
  • Use the monitor input or source button to select the correct port (HDMI 1, HDMI 2, DisplayPort, etc.).
  • Good: Cable secure and input correct. Proceed to Rule out the monitor.
  • Bad: Still no display—try a different cable and port.

Rule out the monitor

Goal: Determine whether the monitor or the PC is the problem.

  • Try a known-good video cable. Try another port on the PC and monitor.
  • Power off both devices. Unplug the monitor for 10 seconds. Power on the monitor first, then the PC.
  • Update graphics drivers from the manufacturer site if the display worked before.
  • Good: Display restored. If not, try another monitor to isolate PC vs monitor.
  • Bad: No display with multiple cables and sources—call a technician.

When to get help

Call a technician if:

  • The monitor shows no signal with multiple cables and sources.
  • The PC does not output to any monitor (GPU may have failed).

Verification

  • The monitor displays the desktop or video from the PC.
  • No “No signal” or “Check cable” message.
  • Correct resolution and refresh rate.

Escalation ladder

Work from the device outward. Stop when the problem is fixed.

  1. Confirm symptom Verify desktop powers on; distinguish no power from no display.
  2. Cable and input Reseat cable; select correct input on monitor.
  3. Try different cable and port Swap cable and try another port on PC and monitor.
  4. Restart and drivers Cold restart both devices; update graphics drivers.
  5. Call a pro No display with multiple cables and sources—GPU or input board may have failed.

What to capture if you need help

Before calling support or posting for help, have these ready. It speeds everything up.

  • Desktop model and GPU:
  • Cable type and connections:
  • Input selected on monitor:
  • Steps already tried:

Does the desktop power on (fans, LED) and does the monitor have a power light?

If the desktop shows no sign of life, see fix-desktop-will-not-turn-on. If the monitor has no power light, see fix-monitor-will-not-turn-on.

Check the desktop power LED and fan. Check the monitor power LED. Both on: cable or input issue—proceed. Desktop off: see fix-desktop-will-not-turn-on. Monitor off: see fix-monitor-will-not-turn-on.

Yes No

You can change your answer later.

Redirect to correct guide

Desktop not powering on: see fix-desktop-will-not-turn-on. Monitor not powering on: see fix-monitor-will-not-turn-on.

Done

Is the cable firmly connected and the correct input selected?

Loose cable or wrong input are the most common causes.

Reseat the cable at both ends. Use the monitor input button to select the correct port (HDMI 1, DisplayPort, etc.). Good: cable secure, input correct—restart both devices. Bad: still no display—try different cable and port.

Yes No

You can change your answer later.

Try a different cable and port

Swap the cable for a known-good one. Try another port on the PC and monitor. If still no display, restart both devices and update graphics drivers. If the monitor works with another PC but not yours, the GPU may have failed—call a technician.

Done

Restart both devices and retest

Power off PC and monitor. Unplug monitor 10 seconds. Power on monitor first, then PC. If still no display, update graphics drivers from NVIDIA, AMD, or Intel. If no display with multiple cables and sources, call a technician.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would a desktop have no display?
Loose or faulty video cable, wrong input selected on the monitor, monitor not powered on, failed GPU, or driver issue. Check cable and input first—most issues are connection-related.
Can I fix a desktop with no display myself?
Yes. Reseat the video cable, select the correct input on the monitor, confirm the monitor is on. Try a different cable and port. Update graphics drivers. If the GPU has failed, a technician may be needed.
When should I call a technician for no display?
If you have tried multiple cables and ports and the monitor works with another PC but not yours—the GPU may have failed. If the monitor shows no signal with any source, the monitor input board may have failed.

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